After upgrading to LS 1.92+ Build 120325 from LS 1.92+ build 120323, I have trouble getting statistics from old existing surveys.

When requesting statistics from admin interface, the output of statistics_function.php generate notices :
Notice: Undefined index: 99641X20X867 in /var/www/clients/client1/web30/web/admin/statistics_function.php on line 1497
Notice: Undefined variable: qtitle in /var/www/clients/client1/web30/web/admin/statistics_function.php on line 1894
Notice: Undefined variable: qquestion in /var/www/clients/client1/web30/web/admin/statistics_function.php on line 1899

After upgrading LS, I see some errors into the fr.po file so I upgraded mine and attach it in this report if it can help.